Emily parked on level -4 and she got on the elevator went up 15 floors and got off. What solve and write the integer?? Brainliest!

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

In priyas math class there are 10 boys and 15 girls. what is the ratio of boys to girls in priyas math class? express your answer as a decimal